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Note: This document or portion of document references a state or local code that aligns with the 2010 ADA Standards requirements.

11B-307.2 Protrusion limits.

Objects with leading edges more than 27 inches (686 mm) and not more than 80 inches (2032 mm) above the finish floor or ground shall protrude 4 inches (102 mm) maximum horizontally into the circulation path.  

Exception: Handrails shall be permitted to protrude 4½ inches (114 mm) maximum.  

[2010 ADAS] Advisory 307.2 Protrusion Limits.  When a cane is used and the element is in the detectable range, it gives a person sufficient time to detect the element with the cane before there is body contact. Elements located on circulation paths, including operable elements, must comply with requirements for protruding objects. For example, awnings and their supporting structures cannot reduce the minimum required vertical clearance. Similarly, casement windows, when open, cannot encroach more than 4 inches (100 mm) into circulation paths above 27 inches (685 mm).


A frontal view shows a person using a cane walking along a wall. A wall-mounted object more than 27 inches from the floor protrudes no more than 4 inches from the wall surface. An object overhead provides vertical clearance that is greater than 80 inches.

FIGURE 11B-307.2


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